diff options
Diffstat (limited to 'src/core/main.c')
| -rw-r--r-- | src/core/main.c | 2204 |
1 files changed, 0 insertions, 2204 deletions
diff --git a/src/core/main.c b/src/core/main.c deleted file mode 100644 index f07ed71b31..0000000000 --- a/src/core/main.c +++ /dev/null @@ -1,2204 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> -#include <fcntl.h> -#include <getopt.h> -#include <signal.h> -#include <stdio.h> -#include <string.h> -#include <sys/mount.h> -#include <sys/prctl.h> -#include <sys/reboot.h> -#include <sys/stat.h> -#include <unistd.h> -#ifdef HAVE_SECCOMP -#include <seccomp.h> -#endif -#ifdef HAVE_VALGRIND_VALGRIND_H -#include <valgrind/valgrind.h> -#endif - -#include "sd-bus.h" -#include "sd-daemon.h" - -#include "alloc-util.h" -#include "architecture.h" -#include "build.h" -#include "bus-error.h" -#include "bus-util.h" -#include "capability-util.h" -#include "clock-util.h" -#include "conf-parser.h" -#include "cpu-set-util.h" -#include "dbus-manager.h" -#include "def.h" -#include "env-util.h" -#include "fd-util.h" -#include "fdset.h" -#include "fileio.h" -#include "formats-util.h" -#include "fs-util.h" -#include "hostname-setup.h" -#include "ima-setup.h" -#include "killall.h" -#include "kmod-setup.h" -#include "load-fragment.h" -#include "log.h" -#include "loopback-setup.h" -#include "machine-id-setup.h" -#include "manager.h" -#include "missing.h" -#include "mount-setup.h" -#include "pager.h" -#include "parse-util.h" -#include "proc-cmdline.h" -#include "process-util.h" -#include "raw-clone.h" -#include "rlimit-util.h" -#ifdef HAVE_SECCOMP -#include "seccomp-util.h" -#endif -#include "selinux-setup.h" -#include "selinux-util.h" -#include "signal-util.h" -#include "smack-setup.h" -#include "special.h" -#include "stat-util.h" -#include "stdio-util.h" -#include "strv.h" -#include "switch-root.h" -#include "terminal-util.h" -#include "umask-util.h" -#include "user-util.h" -#include "virt.h" -#include "watchdog.h" -#include "emergency-action.h" - -static enum { - ACTION_RUN, - ACTION_HELP, - ACTION_VERSION, - ACTION_TEST, - ACTION_DUMP_CONFIGURATION_ITEMS -} arg_action = ACTION_RUN; -static char *arg_default_unit = NULL; -static bool arg_system = false; -static bool arg_dump_core = true; -static int arg_crash_chvt = -1; -static bool arg_crash_shell = false; -static bool arg_crash_reboot = false; -static bool arg_confirm_spawn = false; -static ShowStatus arg_show_status = _SHOW_STATUS_UNSET; -static bool arg_switched_root = false; -static bool arg_no_pager = false; -static char ***arg_join_controllers = NULL; -static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL; -static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT; -static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC; -static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC; -static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC; -static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL; -static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST; -static usec_t arg_runtime_watchdog = 0; -static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE; -static char **arg_default_environment = NULL; -static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {}; -static uint64_t arg_capability_bounding_set = CAP_ALL; -static nsec_t arg_timer_slack_nsec = NSEC_INFINITY; -static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE; -static Set* arg_syscall_archs = NULL; -static FILE* arg_serialization = NULL; -static bool arg_default_cpu_accounting = false; -static bool arg_default_io_accounting = false; -static bool arg_default_blockio_accounting = false; -static bool arg_default_memory_accounting = false; -static bool arg_default_tasks_accounting = true; -static uint64_t arg_default_tasks_max = UINT64_MAX; -static sd_id128_t arg_machine_id = {}; -static EmergencyAction arg_cad_burst_action = EMERGENCY_ACTION_REBOOT_FORCE; - -noreturn static void freeze_or_reboot(void) { - - if (arg_crash_reboot) { - log_notice("Rebooting in 10s..."); - (void) sleep(10); - - log_notice("Rebooting now..."); - (void) reboot(RB_AUTOBOOT); - log_emergency_errno(errno, "Failed to reboot: %m"); - } - - log_emergency("Freezing execution."); - freeze(); -} - -noreturn static void crash(int sig) { - struct sigaction sa; - pid_t pid; - - if (getpid() != 1) - /* Pass this on immediately, if this is not PID 1 */ - (void) raise(sig); - else if (!arg_dump_core) - log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig)); - else { - sa = (struct sigaction) { - .sa_handler = nop_signal_handler, - .sa_flags = SA_NOCLDSTOP|SA_RESTART, - }; - - /* We want to wait for the core process, hence let's enable SIGCHLD */ - (void) sigaction(SIGCHLD, &sa, NULL); - - pid = raw_clone(SIGCHLD); - if (pid < 0) - log_emergency_errno(errno, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig)); - else if (pid == 0) { - /* Enable default signal handler for core dump */ - - sa = (struct sigaction) { - .sa_handler = SIG_DFL, - }; - (void) sigaction(sig, &sa, NULL); - - /* Don't limit the coredump size */ - (void) setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY)); - - /* Just to be sure... */ - (void) chdir("/"); - - /* Raise the signal again */ - pid = raw_getpid(); - (void) kill(pid, sig); /* raise() would kill the parent */ - - assert_not_reached("We shouldn't be here..."); - _exit(EXIT_FAILURE); - } else { - siginfo_t status; - int r; - - /* Order things nicely. */ - r = wait_for_terminate(pid, &status); - if (r < 0) - log_emergency_errno(r, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig)); - else if (status.si_code != CLD_DUMPED) - log_emergency("Caught <%s>, core dump failed (child "PID_FMT", code=%s, status=%i/%s).", - signal_to_string(sig), - pid, sigchld_code_to_string(status.si_code), - status.si_status, - strna(status.si_code == CLD_EXITED - ? exit_status_to_string(status.si_status, EXIT_STATUS_MINIMAL) - : signal_to_string(status.si_status))); - else - log_emergency("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid); - } - } - - if (arg_crash_chvt >= 0) - (void) chvt(arg_crash_chvt); - - sa = (struct sigaction) { - .sa_handler = SIG_IGN, - .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART, - }; - - /* Let the kernel reap children for us */ - (void) sigaction(SIGCHLD, &sa, NULL); - - if (arg_crash_shell) { - log_notice("Executing crash shell in 10s..."); - (void) sleep(10); - - pid = raw_clone(SIGCHLD); - if (pid < 0) - log_emergency_errno(errno, "Failed to fork off crash shell: %m"); - else if (pid == 0) { - (void) setsid(); - (void) make_console_stdio(); - (void) execle("/bin/sh", "/bin/sh", NULL, environ); - - log_emergency_errno(errno, "execle() failed: %m"); - _exit(EXIT_FAILURE); - } else { - log_info("Spawned crash shell as PID "PID_FMT".", pid); - (void) wait_for_terminate(pid, NULL); - } - } - - freeze_or_reboot(); -} - -static void install_crash_handler(void) { - static const struct sigaction sa = { - .sa_handler = crash, - .sa_flags = SA_NODEFER, /* So that we can raise the signal again from the signal handler */ - }; - int r; - - /* We ignore the return value here, since, we don't mind if we - * cannot set up a crash handler */ - r = sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1); - if (r < 0) - log_debug_errno(r, "I had trouble setting up the crash handler, ignoring: %m"); -} - -static int console_setup(void) { - _cleanup_close_ int tty_fd = -1; - int r; - - tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); - if (tty_fd < 0) - return log_error_errno(tty_fd, "Failed to open /dev/console: %m"); - - /* We don't want to force text mode. plymouth may be showing - * pictures already from initrd. */ - r = reset_terminal_fd(tty_fd, false); - if (r < 0) - return log_error_errno(r, "Failed to reset /dev/console: %m"); - - return 0; -} - -static int parse_crash_chvt(const char *value) { - int b; - - if (safe_atoi(value, &arg_crash_chvt) >= 0) - return 0; - - b = parse_boolean(value); - if (b < 0) - return b; - - if (b > 0) - arg_crash_chvt = 0; /* switch to where kmsg goes */ - else - arg_crash_chvt = -1; /* turn off switching */ - - return 0; -} - -static int set_machine_id(const char *m) { - sd_id128_t t; - assert(m); - - if (sd_id128_from_string(m, &t) < 0) - return -EINVAL; - - if (sd_id128_is_null(t)) - return -EINVAL; - - arg_machine_id = t; - return 0; -} - -static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { - - int r; - - assert(key); - - if (streq(key, "systemd.unit") && value) { - - if (!in_initrd()) - return free_and_strdup(&arg_default_unit, value); - - } else if (streq(key, "rd.systemd.unit") && value) { - - if (in_initrd()) - return free_and_strdup(&arg_default_unit, value); - - } else if (streq(key, "systemd.dump_core") && value) { - - r = parse_boolean(value); - if (r < 0) - log_warning("Failed to parse dump core switch %s. Ignoring.", value); - else - arg_dump_core = r; - - } else if (streq(key, "systemd.crash_chvt") && value) { - - if (parse_crash_chvt(value) < 0) - log_warning("Failed to parse crash chvt switch %s. Ignoring.", value); - - } else if (streq(key, "systemd.crash_shell") && value) { - - r = parse_boolean(value); - if (r < 0) - log_warning("Failed to parse crash shell switch %s. Ignoring.", value); - else - arg_crash_shell = r; - - } else if (streq(key, "systemd.crash_reboot") && value) { - - r = parse_boolean(value); - if (r < 0) - log_warning("Failed to parse crash reboot switch %s. Ignoring.", value); - else - arg_crash_reboot = r; - - } else if (streq(key, "systemd.confirm_spawn") && value) { - - r = parse_boolean(value); - if (r < 0) - log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value); - else - arg_confirm_spawn = r; - - } else if (streq(key, "systemd.show_status") && value) { - - r = parse_show_status(value, &arg_show_status); - if (r < 0) - log_warning("Failed to parse show status switch %s. Ignoring.", value); - - } else if (streq(key, "systemd.default_standard_output") && value) { - - r = exec_output_from_string(value); - if (r < 0) - log_warning("Failed to parse default standard output switch %s. Ignoring.", value); - else - arg_default_std_output = r; - - } else if (streq(key, "systemd.default_standard_error") && value) { - - r = exec_output_from_string(value); - if (r < 0) - log_warning("Failed to parse default standard error switch %s. Ignoring.", value); - else - arg_default_std_error = r; - - } else if (streq(key, "systemd.setenv") && value) { - - if (env_assignment_is_valid(value)) { - char **env; - - env = strv_env_set(arg_default_environment, value); - if (env) - arg_default_environment = env; - else - log_warning_errno(ENOMEM, "Setting environment variable '%s' failed, ignoring: %m", value); - } else - log_warning("Environment variable name '%s' is not valid. Ignoring.", value); - - } else if (streq(key, "systemd.machine_id") && value) { - - r = set_machine_id(value); - if (r < 0) - log_warning("MachineID '%s' is not valid. Ignoring.", value); - - } else if (streq(key, "quiet") && !value) { - - if (arg_show_status == _SHOW_STATUS_UNSET) - arg_show_status = SHOW_STATUS_AUTO; - - } else if (streq(key, "debug") && !value) { - - /* Note that log_parse_environment() handles 'debug' - * too, and sets the log level to LOG_DEBUG. */ - - if (detect_container() > 0) - log_set_target(LOG_TARGET_CONSOLE); - - } else if (!value) { - const char *target; - - /* SysV compatibility */ - target = runlevel_to_target(key); - if (target) - return free_and_strdup(&arg_default_unit, target); - - } else if (streq(key, "systemd.default_timeout_start_sec") && value) { - - r = parse_sec(value, &arg_default_timeout_start_usec); - if (r < 0) - log_warning_errno(r, "Failed to parse default start timeout: %s, ignoring.", value); - - if (arg_default_timeout_start_usec <= 0) - arg_default_timeout_start_usec = USEC_INFINITY; - } - - return 0; -} - -#define DEFINE_SETTER(name, func, descr) \ - static int name(const char *unit, \ - const char *filename, \ - unsigned line, \ - const char *section, \ - unsigned section_line, \ - const char *lvalue, \ - int ltype, \ - const char *rvalue, \ - void *data, \ - void *userdata) { \ - \ - int r; \ - \ - assert(filename); \ - assert(lvalue); \ - assert(rvalue); \ - \ - r = func(rvalue); \ - if (r < 0) \ - log_syntax(unit, LOG_ERR, filename, line, r, \ - "Invalid " descr "'%s': %m", \ - rvalue); \ - \ - return 0; \ - } - -DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level") -DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target") -DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" ) -DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location") - -static int config_parse_cpu_affinity2( - const char *unit, - const char *filename, - unsigned line, - const char *section, - unsigned section_line, - const char *lvalue, - int ltype, - const char *rvalue, - void *data, - void *userdata) { - - _cleanup_cpu_free_ cpu_set_t *c = NULL; - int ncpus; - - ncpus = parse_cpu_set_and_warn(rvalue, &c, unit, filename, line, lvalue); - if (ncpus < 0) - return ncpus; - - if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0) - log_warning("Failed to set CPU affinity: %m"); - - return 0; -} - -static int config_parse_show_status( - const char* unit, - const char *filename, - unsigned line, - const char *section, - unsigned section_line, - const char *lvalue, - int ltype, - const char *rvalue, - void *data, - void *userdata) { - - int k; - ShowStatus *b = data; - - assert(filename); - assert(lvalue); - assert(rvalue); - assert(data); - - k = parse_show_status(rvalue, b); - if (k < 0) { - log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse show status setting, ignoring: %s", rvalue); - return 0; - } - - return 0; -} - -static int config_parse_crash_chvt( - const char* unit, - const char *filename, - unsigned line, - const char *section, - unsigned section_line, - const char *lvalue, - int ltype, - const char *rvalue, - void *data, - void *userdata) { - - int r; - - assert(filename); - assert(lvalue); - assert(rvalue); - - r = parse_crash_chvt(rvalue); - if (r < 0) { - log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse CrashChangeVT= setting, ignoring: %s", rvalue); - return 0; - } - - return 0; -} - -static int config_parse_join_controllers(const char *unit, - const char *filename, - unsigned line, - const char *section, - unsigned section_line, - const char *lvalue, - int ltype, - const char *rvalue, - void *data, - void *userdata) { - - const char *whole_rvalue = rvalue; - unsigned n = 0; - - assert(filename); - assert(lvalue); - assert(rvalue); - - arg_join_controllers = strv_free_free(arg_join_controllers); - - for (;;) { - _cleanup_free_ char *word = NULL; - char **l; - int r; - - r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES); - if (r < 0) { - log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue); - return r; - } - if (r == 0) - break; - - l = strv_split(word, ","); - if (!l) - return log_oom(); - strv_uniq(l); - - if (strv_length(l) <= 1) { - strv_free(l); - continue; - } - - if (!arg_join_controllers) { - arg_join_controllers = new(char**, 2); - if (!arg_join_controllers) { - strv_free(l); - return log_oom(); - } - - arg_join_controllers[0] = l; - arg_join_controllers[1] = NULL; - - n = 1; - } else { - char ***a; - char ***t; - - t = new0(char**, n+2); - if (!t) { - strv_free(l); - return log_oom(); - } - - n = 0; - - for (a = arg_join_controllers; *a; a++) { - - if (strv_overlap(*a, l)) { - if (strv_extend_strv(&l, *a, false) < 0) { - strv_free(l); - strv_free_free(t); - return log_oom(); - } - - } else { - char **c; - - c = strv_copy(*a); - if (!c) { - strv_free(l); - strv_free_free(t); - return log_oom(); - } - - t[n++] = c; - } - } - - t[n++] = strv_uniq(l); - - strv_free_free(arg_join_controllers); - arg_join_controllers = t; - } - } - if (!isempty(rvalue)) - log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring."); - - return 0; -} - -static int parse_config_file(void) { - - const ConfigTableItem items[] = { - { "Manager", "LogLevel", config_parse_level2, 0, NULL }, - { "Manager", "LogTarget", config_parse_target, 0, NULL }, - { "Manager", "LogColor", config_parse_color, 0, NULL }, - { "Manager", "LogLocation", config_parse_location, 0, NULL }, - { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core }, - { "Manager", "CrashChVT", /* legacy */ config_parse_crash_chvt, 0, NULL }, - { "Manager", "CrashChangeVT", config_parse_crash_chvt, 0, NULL }, - { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell }, - { "Manager", "CrashReboot", config_parse_bool, 0, &arg_crash_reboot }, - { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status }, - { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL }, - { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers }, - { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog }, - { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog }, - { "Manager", "CapabilityBoundingSet", config_parse_capability_set, 0, &arg_capability_bounding_set }, -#ifdef HAVE_SECCOMP - { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs }, -#endif - { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec }, - { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec }, - { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output }, - { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error }, - { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec }, - { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec }, - { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec }, - { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval }, /* obsolete alias */ - { "Manager", "DefaultStartLimitIntervalSec",config_parse_sec, 0, &arg_default_start_limit_interval }, - { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst }, - { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment }, - { "Manager", "DefaultLimitCPU", config_parse_limit, RLIMIT_CPU, arg_default_rlimit }, - { "Manager", "DefaultLimitFSIZE", config_parse_limit, RLIMIT_FSIZE, arg_default_rlimit }, - { "Manager", "DefaultLimitDATA", config_parse_limit, RLIMIT_DATA, arg_default_rlimit }, - { "Manager", "DefaultLimitSTACK", config_parse_limit, RLIMIT_STACK, arg_default_rlimit }, - { "Manager", "DefaultLimitCORE", config_parse_limit, RLIMIT_CORE, arg_default_rlimit }, - { "Manager", "DefaultLimitRSS", config_parse_limit, RLIMIT_RSS, arg_default_rlimit }, - { "Manager", "DefaultLimitNOFILE", config_parse_limit, RLIMIT_NOFILE, arg_default_rlimit }, - { "Manager", "DefaultLimitAS", config_parse_limit, RLIMIT_AS, arg_default_rlimit }, - { "Manager", "DefaultLimitNPROC", config_parse_limit, RLIMIT_NPROC, arg_default_rlimit }, - { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, RLIMIT_MEMLOCK, arg_default_rlimit }, - { "Manager", "DefaultLimitLOCKS", config_parse_limit, RLIMIT_LOCKS, arg_default_rlimit }, - { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, RLIMIT_SIGPENDING, arg_default_rlimit }, - { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, RLIMIT_MSGQUEUE, arg_default_rlimit }, - { "Manager", "DefaultLimitNICE", config_parse_limit, RLIMIT_NICE, arg_default_rlimit }, - { "Manager", "DefaultLimitRTPRIO", config_parse_limit, RLIMIT_RTPRIO, arg_default_rlimit }, - { "Manager", "DefaultLimitRTTIME", config_parse_limit, RLIMIT_RTTIME, arg_default_rlimit }, - { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting }, - { "Manager", "DefaultIOAccounting", config_parse_bool, 0, &arg_default_io_accounting }, - { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting }, - { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting }, - { "Manager", "DefaultTasksAccounting", config_parse_bool, 0, &arg_default_tasks_accounting }, - { "Manager", "DefaultTasksMax", config_parse_tasks_max, 0, &arg_default_tasks_max }, - { "Manager", "CtrlAltDelBurstAction", config_parse_emergency_action, 0, &arg_cad_burst_action }, - {} - }; - - const char *fn, *conf_dirs_nulstr; - - fn = arg_system ? - PKGSYSCONFDIR "/system.conf" : - PKGSYSCONFDIR "/user.conf"; - - conf_dirs_nulstr = arg_system ? - CONF_PATHS_NULSTR("systemd/system.conf.d") : - CONF_PATHS_NULSTR("systemd/user.conf.d"); - - config_parse_many_nulstr(fn, conf_dirs_nulstr, "Manager\0", config_item_table_lookup, items, false, NULL); - - /* Traditionally "0" was used to turn off the default unit timeouts. Fix this up so that we used USEC_INFINITY - * like everywhere else. */ - if (arg_default_timeout_start_usec <= 0) - arg_default_timeout_start_usec = USEC_INFINITY; - if (arg_default_timeout_stop_usec <= 0) - arg_default_timeout_stop_usec = USEC_INFINITY; - - return 0; -} - -static void manager_set_defaults(Manager *m) { - - assert(m); - - m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec; - m->default_std_output = arg_default_std_output; - m->default_std_error = arg_default_std_error; - m->default_timeout_start_usec = arg_default_timeout_start_usec; - m->default_timeout_stop_usec = arg_default_timeout_stop_usec; - m->default_restart_usec = arg_default_restart_usec; - m->default_start_limit_interval = arg_default_start_limit_interval; - m->default_start_limit_burst = arg_default_start_limit_burst; - m->default_cpu_accounting = arg_default_cpu_accounting; - m->default_io_accounting = arg_default_io_accounting; - m->default_blockio_accounting = arg_default_blockio_accounting; - m->default_memory_accounting = arg_default_memory_accounting; - m->default_tasks_accounting = arg_default_tasks_accounting; - m->default_tasks_max = arg_default_tasks_max; - - manager_set_default_rlimits(m, arg_default_rlimit); - manager_environment_add(m, NULL, arg_default_environment); -} - -static int parse_argv(int argc, char *argv[]) { - - enum { - ARG_LOG_LEVEL = 0x100, - ARG_LOG_TARGET, - ARG_LOG_COLOR, - ARG_LOG_LOCATION, - ARG_UNIT, - ARG_SYSTEM, - ARG_USER, - ARG_TEST, - ARG_NO_PAGER, - ARG_VERSION, - ARG_DUMP_CONFIGURATION_ITEMS, - ARG_DUMP_CORE, - ARG_CRASH_CHVT, - ARG_CRASH_SHELL, - ARG_CRASH_REBOOT, - ARG_CONFIRM_SPAWN, - ARG_SHOW_STATUS, - ARG_DESERIALIZE, - ARG_SWITCHED_ROOT, - ARG_DEFAULT_STD_OUTPUT, - ARG_DEFAULT_STD_ERROR, - ARG_MACHINE_ID - }; - - static const struct option options[] = { - { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, - { "log-target", required_argument, NULL, ARG_LOG_TARGET }, - { "log-color", optional_argument, NULL, ARG_LOG_COLOR }, - { "log-location", optional_argument, NULL, ARG_LOG_LOCATION }, - { "unit", required_argument, NULL, ARG_UNIT }, - { "system", no_argument, NULL, ARG_SYSTEM }, - { "user", no_argument, NULL, ARG_USER }, - { "test", no_argument, NULL, ARG_TEST }, - { "no-pager", no_argument, NULL, ARG_NO_PAGER }, - { "help", no_argument, NULL, 'h' }, - { "version", no_argument, NULL, ARG_VERSION }, - { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS }, - { "dump-core", optional_argument, NULL, ARG_DUMP_CORE }, - { "crash-chvt", required_argument, NULL, ARG_CRASH_CHVT }, - { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL }, - { "crash-reboot", optional_argument, NULL, ARG_CRASH_REBOOT }, - { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN }, - { "show-status", optional_argument, NULL, ARG_SHOW_STATUS }, - { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, - { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT }, - { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, }, - { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, }, - { "machine-id", required_argument, NULL, ARG_MACHINE_ID }, - {} - }; - - int c, r; - - assert(argc >= 1); - assert(argv); - - if (getpid() == 1) - opterr = 0; - - while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0) - - switch (c) { - - case ARG_LOG_LEVEL: - r = log_set_max_level_from_string(optarg); - if (r < 0) { - log_error("Failed to parse log level %s.", optarg); - return r; - } - - break; - - case ARG_LOG_TARGET: - r = log_set_target_from_string(optarg); - if (r < 0) { - log_error("Failed to parse log target %s.", optarg); - return r; - } - - break; - - case ARG_LOG_COLOR: - - if (optarg) { - r = log_show_color_from_string(optarg); - if (r < 0) { - log_error("Failed to parse log color setting %s.", optarg); - return r; - } - } else - log_show_color(true); - - break; - - case ARG_LOG_LOCATION: - if (optarg) { - r = log_show_location_from_string(optarg); - if (r < 0) { - log_error("Failed to parse log location setting %s.", optarg); - return r; - } - } else - log_show_location(true); - - break; - - case ARG_DEFAULT_STD_OUTPUT: - r = exec_output_from_string(optarg); - if (r < 0) { - log_error("Failed to parse default standard output setting %s.", optarg); - return r; - } else - arg_default_std_output = r; - break; - - case ARG_DEFAULT_STD_ERROR: - r = exec_output_from_string(optarg); - if (r < 0) { - log_error("Failed to parse default standard error output setting %s.", optarg); - return r; - } else - arg_default_std_error = r; - break; - - case ARG_UNIT: - - r = free_and_strdup(&arg_default_unit, optarg); - if (r < 0) - return log_error_errno(r, "Failed to set default unit %s: %m", optarg); - - break; - - case ARG_SYSTEM: - arg_system = true; - break; - - case ARG_USER: - arg_system = false; - break; - - case ARG_TEST: - arg_action = ACTION_TEST; - break; - - case ARG_NO_PAGER: - arg_no_pager = true; - break; - - case ARG_VERSION: - arg_action = ACTION_VERSION; - break; - - case ARG_DUMP_CONFIGURATION_ITEMS: - arg_action = ACTION_DUMP_CONFIGURATION_ITEMS; - break; - - case ARG_DUMP_CORE: - if (!optarg) - arg_dump_core = true; - else { - r = parse_boolean(optarg); - if (r < 0) - return log_error_errno(r, "Failed to parse dump core boolean: %s", optarg); - arg_dump_core = r; - } - break; - - case ARG_CRASH_CHVT: - r = parse_crash_chvt(optarg); - if (r < 0) - return log_error_errno(r, "Failed to parse crash virtual terminal index: %s", optarg); - break; - - case ARG_CRASH_SHELL: - if (!optarg) - arg_crash_shell = true; - else { - r = parse_boolean(optarg); - if (r < 0) - return log_error_errno(r, "Failed to parse crash shell boolean: %s", optarg); - arg_crash_shell = r; - } - break; - - case ARG_CRASH_REBOOT: - if (!optarg) - arg_crash_reboot = true; - else { - r = parse_boolean(optarg); - if (r < 0) - return log_error_errno(r, "Failed to parse crash shell boolean: %s", optarg); - arg_crash_reboot = r; - } - break; - - case ARG_CONFIRM_SPAWN: - r = optarg ? parse_boolean(optarg) : 1; - if (r < 0) { - log_error("Failed to parse confirm spawn boolean %s.", optarg); - return r; - } - arg_confirm_spawn = r; - break; - - case ARG_SHOW_STATUS: - if (optarg) { - r = parse_show_status(optarg, &arg_show_status); - if (r < 0) { - log_error("Failed to parse show status boolean %s.", optarg); - return r; - } - } else - arg_show_status = SHOW_STATUS_YES; - break; - - case ARG_DESERIALIZE: { - int fd; - FILE *f; - - r = safe_atoi(optarg, &fd); - if (r < 0 || fd < 0) { - log_error("Failed to parse deserialize option %s.", optarg); - return -EINVAL; - } - - (void) fd_cloexec(fd, true); - - f = fdopen(fd, "r"); - if (!f) - return log_error_errno(errno, "Failed to open serialization fd: %m"); - - safe_fclose(arg_serialization); - arg_serialization = f; - - break; - } - - case ARG_SWITCHED_ROOT: - arg_switched_root = true; - break; - - case ARG_MACHINE_ID: - r = set_machine_id(optarg); - if (r < 0) - return log_error_errno(r, "MachineID '%s' is not valid.", optarg); - break; - - case 'h': - arg_action = ACTION_HELP; - break; - - case 'D': - log_set_max_level(LOG_DEBUG); - break; - - case 'b': - case 's': - case 'z': - /* Just to eat away the sysvinit kernel - * cmdline args without getopt() error - * messages that we'll parse in - * parse_proc_cmdline_word() or ignore. */ - - case '?': - if (getpid() != 1) - return -EINVAL; - else - return 0; - - default: - assert_not_reached("Unhandled option code."); - } - - if (optind < argc && getpid() != 1) { - /* Hmm, when we aren't run as init system - * let's complain about excess arguments */ - - log_error("Excess arguments."); - return -EINVAL; - } - - return 0; -} - -static int help(void) { - - printf("%s [OPTIONS...]\n\n" - "Starts up and maintains the system or user services.\n\n" - " -h --help Show this help\n" - " --test Determine startup sequence, dump it and exit\n" - " --no-pager Do not pipe output into a pager\n" - " --dump-configuration-items Dump understood unit configuration items\n" - " --unit=UNIT Set default unit\n" - " --system Run a system instance, even if PID != 1\n" - " --user Run a user instance\n" - " --dump-core[=BOOL] Dump core on crash\n" - " --crash-vt=NR Change to specified VT on crash\n" - " --crash-reboot[=BOOL] Reboot on crash\n" - " --crash-shell[=BOOL] Run shell on crash\n" - " --confirm-spawn[=BOOL] Ask for confirmation when spawning processes\n" - " --show-status[=BOOL] Show status updates on the console during bootup\n" - " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n" - " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n" - " --log-color[=BOOL] Highlight important log messages\n" - " --log-location[=BOOL] Include code location in log messages\n" - " --default-standard-output= Set default standard output for services\n" - " --default-standard-error= Set default standard error output for services\n", - program_invocation_short_name); - - return 0; -} - -static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) { - _cleanup_fdset_free_ FDSet *fds = NULL; - _cleanup_fclose_ FILE *f = NULL; - int r; - - assert(m); - assert(_f); - assert(_fds); - - r = manager_open_serialization(m, &f); - if (r < 0) - return log_error_errno(r, "Failed to create serialization file: %m"); - - /* Make sure nothing is really destructed when we shut down */ - m->n_reloading++; - bus_manager_send_reloading(m, true); - - fds = fdset_new(); - if (!fds) - return log_oom(); - - r = manager_serialize(m, f, fds, switching_root); - if (r < 0) - return log_error_errno(r, "Failed to serialize state: %m"); - - if (fseeko(f, 0, SEEK_SET) == (off_t) -1) - return log_error_errno(errno, "Failed to rewind serialization fd: %m"); - - r = fd_cloexec(fileno(f), false); - if (r < 0) - return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m"); - - r = fdset_cloexec(fds, false); - if (r < 0) - return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m"); - - *_f = f; - *_fds = fds; - - f = NULL; - fds = NULL; - - return 0; -} - -static int bump_rlimit_nofile(struct rlimit *saved_rlimit) { - struct rlimit nl; - int r; - - assert(saved_rlimit); - - /* Save the original RLIMIT_NOFILE so that we can reset it - * later when transitioning from the initrd to the main - * systemd or suchlike. */ - if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) - return log_warning_errno(errno, "Reading RLIMIT_NOFILE failed, ignoring: %m"); - - /* Make sure forked processes get the default kernel setting */ - if (!arg_default_rlimit[RLIMIT_NOFILE]) { - struct rlimit *rl; - - rl = newdup(struct rlimit, saved_rlimit, 1); - if (!rl) - return log_oom(); - - arg_default_rlimit[RLIMIT_NOFILE] = rl; - } - - /* Bump up the resource limit for ourselves substantially */ - nl.rlim_cur = nl.rlim_max = 64*1024; - r = setrlimit_closest(RLIMIT_NOFILE, &nl); - if (r < 0) - return log_warning_errno(r, "Setting RLIMIT_NOFILE failed, ignoring: %m"); - - return 0; -} - -static void test_usr(void) { - - /* Check that /usr is not a separate fs */ - - if (dir_is_empty("/usr") <= 0) - return; - - log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. " - "Some things will probably break (sometimes even silently) in mysterious ways. " - "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information."); -} - -static int initialize_join_controllers(void) { - /* By default, mount "cpu" + "cpuacct" together, and "net_cls" - * + "net_prio". We'd like to add "cpuset" to the mix, but - * "cpuset" doesn't really work for groups with no initialized - * attributes. */ - - arg_join_controllers = new(char**, 3); - if (!arg_join_controllers) - return -ENOMEM; - - arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL); - if (!arg_join_controllers[0]) - goto oom; - - arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL); - if (!arg_join_controllers[1]) - goto oom; - - arg_join_controllers[2] = NULL; - return 0; - -oom: - arg_join_controllers = strv_free_free(arg_join_controllers); - return -ENOMEM; -} - -static int enforce_syscall_archs(Set *archs) { -#ifdef HAVE_SECCOMP - scmp_filter_ctx *seccomp; - Iterator i; - void *id; - int r; - - if (!is_seccomp_available()) - return 0; - - seccomp = seccomp_init(SCMP_ACT_ALLOW); - if (!seccomp) - return log_oom(); - - SET_FOREACH(id, arg_syscall_archs, i) { - r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1); - if (r == -EEXIST) - continue; - if (r < 0) { - log_error_errno(r, "Failed to add architecture to seccomp: %m"); - goto finish; - } - } - - r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0); - if (r < 0) { - log_error_errno(r, "Failed to unset NO_NEW_PRIVS: %m"); - goto finish; - } - - r = seccomp_load(seccomp); - if (r < 0) - log_error_errno(r, "Failed to add install architecture seccomp: %m"); - -finish: - seccomp_release(seccomp); - return r; -#else - return 0; -#endif -} - -static int status_welcome(void) { - _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL; - int r; - - r = parse_env_file("/etc/os-release", NEWLINE, - "PRETTY_NAME", &pretty_name, - "ANSI_COLOR", &ansi_color, - NULL); - if (r == -ENOENT) - r = parse_env_file("/usr/lib/os-release", NEWLINE, - "PRETTY_NAME", &pretty_name, - "ANSI_COLOR", &ansi_color, - NULL); - - if (r < 0 && r != -ENOENT) - log_warning_errno(r, "Failed to read os-release file: %m"); - - if (log_get_show_color()) - return status_printf(NULL, false, false, - "\nWelcome to \x1B[%sm%s\x1B[0m!\n", - isempty(ansi_color) ? "1" : ansi_color, - isempty(pretty_name) ? "GNU/Linux" : pretty_name); - else - return status_printf(NULL, false, false, - "\nWelcome to %s!\n", - isempty(pretty_name) ? "GNU/Linux" : pretty_name); -} - -static int write_container_id(void) { - const char *c; - int r; - - c = getenv("container"); - if (isempty(c)) - return 0; - - RUN_WITH_UMASK(0022) - r = write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE); - if (r < 0) - return log_warning_errno(r, "Failed to write /run/systemd/container, ignoring: %m"); - - return 1; -} - -static int bump_unix_max_dgram_qlen(void) { - _cleanup_free_ char *qlen = NULL; - unsigned long v; - int r; - - /* Let's bump the net.unix.max_dgram_qlen sysctl. The kernel - * default of 16 is simply too low. We set the value really - * really early during boot, so that it is actually applied to - * all our sockets, including the $NOTIFY_SOCKET one. */ - - r = read_one_line_file("/proc/sys/net/unix/max_dgram_qlen", &qlen); - if (r < 0) - return log_warning_errno(r, "Failed to read AF_UNIX datagram queue length, ignoring: %m"); - - r = safe_atolu(qlen, &v); - if (r < 0) - return log_warning_errno(r, "Failed to parse AF_UNIX datagram queue length, ignoring: %m"); - - if (v >= DEFAULT_UNIX_MAX_DGRAM_QLEN) - return 0; - - qlen = mfree(qlen); - if (asprintf(&qlen, "%lu\n", DEFAULT_UNIX_MAX_DGRAM_QLEN) < 0) - return log_oom(); - - r = write_string_file("/proc/sys/net/unix/max_dgram_qlen", qlen, 0); - if (r < 0) - return log_full_errno(IN_SET(r, -EROFS, -EPERM, -EACCES) ? LOG_DEBUG : LOG_WARNING, r, - "Failed to bump AF_UNIX datagram queue length, ignoring: %m"); - - return 1; -} - -static int fixup_environment(void) { - _cleanup_free_ char *term = NULL; - int r; - - /* We expect the environment to be set correctly - * if run inside a container. */ - if (detect_container() > 0) - return 0; - - /* When started as PID1, the kernel uses /dev/console - * for our stdios and uses TERM=linux whatever the - * backend device used by the console. We try to make - * a better guess here since some consoles might not - * have support for color mode for example. - * - * However if TERM was configured through the kernel - * command line then leave it alone. */ - - r = get_proc_cmdline_key("TERM=", &term); - if (r < 0) - return r; - - if (r == 0) { - term = strdup(default_term_for_tty("/dev/console")); - if (!term) - return -ENOMEM; - } - - if (setenv("TERM", term, 1) < 0) - return -errno; - - return 0; -} - -int main(int argc, char *argv[]) { - Manager *m = NULL; - int r, retval = EXIT_FAILURE; - usec_t before_startup, after_startup; - char timespan[FORMAT_TIMESPAN_MAX]; - FDSet *fds = NULL; - bool reexecute = false; - const char *shutdown_verb = NULL; - dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL; - dual_timestamp userspace_timestamp = DUAL_TIMESTAMP_NULL; - dual_timestamp kernel_timestamp = DUAL_TIMESTAMP_NULL; - dual_timestamp security_start_timestamp = DUAL_TIMESTAMP_NULL; - dual_timestamp security_finish_timestamp = DUAL_TIMESTAMP_NULL; - static char systemd[] = "systemd"; - bool skip_setup = false; - unsigned j; - bool loaded_policy = false; - bool arm_reboot_watchdog = false; - bool queue_default_job = false; - bool empty_etc = false; - char *switch_root_dir = NULL, *switch_root_init = NULL; - struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0); - const char *error_message = NULL; - -#ifdef HAVE_SYSV_COMPAT - if (getpid() != 1 && strstr(program_invocation_short_name, "init")) { - /* This is compatibility support for SysV, where - * calling init as a user is identical to telinit. */ - - execv(SYSTEMCTL_BINARY_PATH, argv); - log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m"); - return 1; - } -#endif - - dual_timestamp_from_monotonic(&kernel_timestamp, 0); - dual_timestamp_get(&userspace_timestamp); - - /* Determine if this is a reexecution or normal bootup. We do - * the full command line parsing much later, so let's just - * have a quick peek here. */ - if (strv_find(argv+1, "--deserialize")) - skip_setup = true; - - /* If we have switched root, do all the special setup - * things */ - if (strv_find(argv+1, "--switched-root")) - skip_setup = false; - - /* If we get started via the /sbin/init symlink then we are - called 'init'. After a subsequent reexecution we are then - called 'systemd'. That is confusing, hence let's call us - systemd right-away. */ - program_invocation_short_name = systemd; - prctl(PR_SET_NAME, systemd); - - saved_argv = argv; - saved_argc = argc; - - log_set_upgrade_syslog_to_journal(true); - - /* Disable the umask logic */ - if (getpid() == 1) - umask(0); - - if (getpid() == 1 && detect_container() <= 0) { - - /* Running outside of a container as PID 1 */ - arg_system = true; - log_set_target(LOG_TARGET_KMSG); - log_open(); - - if (in_initrd()) - initrd_timestamp = userspace_timestamp; - - if (!skip_setup) { - r = mount_setup_early(); - if (r < 0) { - error_message = "Failed to early mount API filesystems"; - goto finish; - } - dual_timestamp_get(&security_start_timestamp); - if (mac_selinux_setup(&loaded_policy) < 0) { - error_message = "Failed to load SELinux policy"; - goto finish; - } else if (mac_smack_setup(&loaded_policy) < 0) { - error_message = "Failed to load SMACK policy"; - goto finish; - } else if (ima_setup() < 0) { - error_message = "Failed to load IMA policy"; - goto finish; - } - dual_timestamp_get(&security_finish_timestamp); - } - - if (mac_selinux_init() < 0) { - error_message = "Failed to initialize SELinux policy"; - goto finish; - } - - if (!skip_setup) { - if (clock_is_localtime(NULL) > 0) { - int min; - - /* - * The very first call of settimeofday() also does a time warp in the kernel. - * - * In the rtc-in-local time mode, we set the kernel's timezone, and rely on - * external tools to take care of maintaining the RTC and do all adjustments. - * This matches the behavior of Windows, which leaves the RTC alone if the - * registry tells that the RTC runs in UTC. - */ - r = clock_set_timezone(&min); - if (r < 0) - log_error_errno(r, "Failed to apply local time delta, ignoring: %m"); - else - log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min); - } else if (!in_initrd()) { - /* - * Do a dummy very first call to seal the kernel's time warp magic. - * - * Do not call this from inside the initrd. The initrd might not - * carry /etc/adjtime with LOCAL, but the real system could be set up - * that way. In such case, we need to delay the time-warp or the sealing - * until we reach the real system. - * - * Do no set the kernel's timezone. The concept of local time cannot - * be supported reliably, the time will jump or be incorrect at every daylight - * saving time change. All kernel local time concepts will be treated - * as UTC that way. - */ - (void) clock_reset_timewarp(); - } - - r = clock_apply_epoch(); - if (r < 0) - log_error_errno(r, "Current system time is before build time, but cannot correct: %m"); - else if (r > 0) - log_info("System time before build time, advancing clock."); - } - - /* Set the default for later on, but don't actually - * open the logs like this for now. Note that if we - * are transitioning from the initrd there might still - * be journal fd open, and we shouldn't attempt - * opening that before we parsed /proc/cmdline which - * might redirect output elsewhere. */ - log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); - - } else if (getpid() == 1) { - /* Running inside a container, as PID 1 */ - arg_system = true; - log_set_target(LOG_TARGET_CONSOLE); - log_close_console(); /* force reopen of /dev/console */ - log_open(); - - /* For the later on, see above... */ - log_set_target(LOG_TARGET_JOURNAL); - - /* clear the kernel timestamp, - * because we are in a container */ - kernel_timestamp = DUAL_TIMESTAMP_NULL; - } else { - /* Running as user instance */ - arg_system = false; - log_set_target(LOG_TARGET_AUTO); - log_open(); - - /* clear the kernel timestamp, - * because we are not PID 1 */ - kernel_timestamp = DUAL_TIMESTAMP_NULL; - } - - if (getpid() == 1) { - /* Don't limit the core dump size, so that coredump handlers such as systemd-coredump (which honour the limit) - * will process core dumps for system services by default. */ - if (setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY)) < 0) - log_warning_errno(errno, "Failed to set RLIMIT_CORE: %m"); - - /* But at the same time, turn off the core_pattern logic by default, so that no coredumps are stored - * until the systemd-coredump tool is enabled via sysctl. */ - if (!skip_setup) - (void) write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0); - } - - if (arg_system) { - if (fixup_environment() < 0) { - error_message = "Failed to fix up PID1 environment"; - goto finish; - } - - /* Try to figure out if we can use colors with the console. No - * need to do that for user instances since they never log - * into the console. */ - log_show_color(colors_enabled()); - r = make_null_stdio(); - if (r < 0) - log_warning_errno(r, "Failed to redirect standard streams to /dev/null: %m"); - } - - r = initialize_join_controllers(); - if (r < 0) { - error_message = "Failed to initialize cgroup controllers"; - goto finish; - } - - /* Mount /proc, /sys and friends, so that /proc/cmdline and - * /proc/$PID/fd is available. */ - if (getpid() == 1) { - - /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */ - if (!skip_setup) - kmod_setup(); - - r = mount_setup(loaded_policy); - if (r < 0) { - error_message = "Failed to mount API filesystems"; - goto finish; - } - } - - /* Reset all signal handlers. */ - (void) reset_all_signal_handlers(); - (void) ignore_signals(SIGNALS_IGNORE, -1); - - arg_default_tasks_max = system_tasks_max_scale(DEFAULT_TASKS_MAX_PERCENTAGE, 100U); - - if (parse_config_file() < 0) { - error_message = "Failed to parse config file"; - goto finish; - } - - if (arg_system) { - r = parse_proc_cmdline(parse_proc_cmdline_item, NULL, false); - if (r < 0) - log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); - } - - /* Note that this also parses bits from the kernel command - * line, including "debug". */ - log_parse_environment(); - - if (parse_argv(argc, argv) < 0) { - error_message = "Failed to parse commandline arguments"; - goto finish; - } - - /* Initialize default unit */ - if (!arg_default_unit) { - arg_default_unit = strdup(SPECIAL_DEFAULT_TARGET); - if (!arg_default_unit) { - r = log_oom(); - error_message = "Failed to set default unit"; - goto finish; - } - } - - if (arg_action == ACTION_TEST && - geteuid() == 0) { - log_error("Don't run test mode as root."); - goto finish; - } - - if (!arg_system && - arg_action == ACTION_RUN && - sd_booted() <= 0) { - log_error("Trying to run as user instance, but the system has not been booted with systemd."); - goto finish; - } - - if (arg_system && - arg_action == ACTION_RUN && - running_in_chroot() > 0) { - log_error("Cannot be run in a chroot() environment."); - goto finish; - } - - if (arg_action == ACTION_TEST || arg_action == ACTION_HELP) { - pager_open(arg_no_pager, false); - skip_setup = true; - } - - if (arg_action == ACTION_HELP) { - retval = help(); - goto finish; - } else if (arg_action == ACTION_VERSION) { - retval = version(); - goto finish; - } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) { - pager_open(arg_no_pager, false); - unit_dump_config_items(stdout); - retval = EXIT_SUCCESS; - goto finish; - } - - if (!arg_system && - !getenv("XDG_RUNTIME_DIR")) { - log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set."); - goto finish; - } - - assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST); - - /* Close logging fds, in order not to confuse fdset below */ - log_close(); - - /* Remember open file descriptors for later deserialization */ - r = fdset_new_fill(&fds); - if (r < 0) { - log_emergency_errno(r, "Failed to allocate fd set: %m"); - error_message = "Failed to allocate fd set"; - goto finish; - } else - fdset_cloexec(fds, true); - - if (arg_serialization) - assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0); - - if (arg_system) - /* Become a session leader if we aren't one yet. */ - setsid(); - - /* Move out of the way, so that we won't block unmounts */ - assert_se(chdir("/") == 0); - - /* Reset the console, but only if this is really init and we - * are freshly booted */ - if (arg_system && arg_action == ACTION_RUN) { - - /* If we are init, we connect stdin/stdout/stderr to - * /dev/null and make sure we don't have a controlling - * tty. */ - release_terminal(); - - if (getpid() == 1 && !skip_setup) - console_setup(); - } - - /* Open the logging devices, if possible and necessary */ - log_open(); - - if (arg_show_status == _SHOW_STATUS_UNSET) - arg_show_status = SHOW_STATUS_YES; - - /* Make sure we leave a core dump without panicing the - * kernel. */ - if (getpid() == 1) { - install_crash_handler(); - - r = mount_cgroup_controllers(arg_join_controllers); - if (r < 0) - goto finish; - } - - if (arg_system) { - int v; - - log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")", - arg_action == ACTION_TEST ? "test " : "" ); - - v = detect_virtualization(); - if (v > 0) - log_info("Detected virtualization %s.", virtualization_to_string(v)); - - write_container_id(); - - log_info("Detected architecture %s.", architecture_to_string(uname_architecture())); - - if (in_initrd()) - log_info("Running in initial RAM disk."); - - /* Let's check whether /etc is already populated. We - * don't actually really check for that, but use - * /etc/machine-id as flag file. This allows container - * managers and installers to provision a couple of - * files already. If the container manager wants to - * provision the machine ID itself it should pass - * $container_uuid to PID 1. */ - - empty_etc = access("/etc/machine-id", F_OK) < 0; - if (empty_etc) - log_info("Running with unpopulated /etc."); - } else { - _cleanup_free_ char *t; - - t = uid_to_name(getuid()); - log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")", - arg_action == ACTION_TEST ? " test" : "", getuid(), t); - } - - if (arg_system && !skip_setup) { - if (arg_show_status > 0) - status_welcome(); - - hostname_setup(); - machine_id_setup(NULL, arg_machine_id, NULL); - loopback_setup(); - bump_unix_max_dgram_qlen(); - - test_usr(); - } - - if (arg_system && arg_runtime_watchdog > 0 && arg_runtime_watchdog != USEC_INFINITY) - watchdog_set_timeout(&arg_runtime_watchdog); - - if (arg_timer_slack_nsec != NSEC_INFINITY) - if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0) - log_error_errno(errno, "Failed to adjust timer slack: %m"); - - if (!cap_test_all(arg_capability_bounding_set)) { - r = capability_bounding_set_drop_usermode(arg_capability_bounding_set); - if (r < 0) { - log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m"); - error_message = "Failed to drop capability bounding set of usermode helpers"; - goto finish; - } - r = capability_bounding_set_drop(arg_capability_bounding_set, true); - if (r < 0) { - log_emergency_errno(r, "Failed to drop capability bounding set: %m"); - error_message = "Failed to drop capability bounding set"; - goto finish; - } - } - - if (arg_syscall_archs) { - r = enforce_syscall_archs(arg_syscall_archs); - if (r < 0) { - error_message = "Failed to set syscall architectures"; - goto finish; - } - } - - if (!arg_system) - /* Become reaper of our children */ - if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) - log_warning_errno(errno, "Failed to make us a subreaper: %m"); - - if (arg_system) { - (void) bump_rlimit_nofile(&saved_rlimit_nofile); - - if (empty_etc) { - r = unit_file_preset_all(UNIT_FILE_SYSTEM, 0, NULL, UNIT_FILE_PRESET_ENABLE_ONLY, NULL, 0); - if (r < 0) - log_full_errno(r == -EEXIST ? LOG_NOTICE : LOG_WARNING, r, "Failed to populate /etc with preset unit settings, ignoring: %m"); - else - log_info("Populated /etc with preset unit settings."); - } - } - - r = manager_new(arg_system ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, arg_action == ACTION_TEST, &m); - if (r < 0) { - log_emergency_errno(r, "Failed to allocate manager object: %m"); - error_message = "Failed to allocate manager object"; - goto finish; - } - - m->confirm_spawn = arg_confirm_spawn; - m->runtime_watchdog = arg_runtime_watchdog; - m->shutdown_watchdog = arg_shutdown_watchdog; - m->userspace_timestamp = userspace_timestamp; - m->kernel_timestamp = kernel_timestamp; - m->initrd_timestamp = initrd_timestamp; - m->security_start_timestamp = security_start_timestamp; - m->security_finish_timestamp = security_finish_timestamp; - m->cad_burst_action = arg_cad_burst_action; - - manager_set_defaults(m); - manager_set_show_status(m, arg_show_status); - manager_set_first_boot(m, empty_etc); - - /* Remember whether we should queue the default job */ - queue_default_job = !arg_serialization || arg_switched_root; - - before_startup = now(CLOCK_MONOTONIC); - - r = manager_startup(m, arg_serialization, fds); - if (r < 0) - log_error_errno(r, "Failed to fully start up daemon: %m"); - - /* This will close all file descriptors that were opened, but - * not claimed by any unit. */ - fds = fdset_free(fds); - - arg_serialization = safe_fclose(arg_serialization); - - if (queue_default_job) { - _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; - Unit *target = NULL; - Job *default_unit_job; - - log_debug("Activating default unit: %s", arg_default_unit); - - r = manager_load_unit(m, arg_default_unit, NULL, &error, &target); - if (r < 0) - log_error("Failed to load default target: %s", bus_error_message(&error, r)); - else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) - log_error_errno(target->load_error, "Failed to load default target: %m"); - else if (target->load_state == UNIT_MASKED) - log_error("Default target masked."); - - if (!target || target->load_state != UNIT_LOADED) { - log_info("Trying to load rescue target..."); - - r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target); - if (r < 0) { - log_emergency("Failed to load rescue target: %s", bus_error_message(&error, r)); - error_message = "Failed to load rescue target"; - goto finish; - } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) { - log_emergency_errno(target->load_error, "Failed to load rescue target: %m"); - error_message = "Failed to load rescue target"; - goto finish; - } else if (target->load_state == UNIT_MASKED) { - log_emergency("Rescue target masked."); - error_message = "Rescue target masked"; - goto finish; - } - } - - assert(target->load_state == UNIT_LOADED); - - if (arg_action == ACTION_TEST) { - printf("-> By units:\n"); - manager_dump_units(m, stdout, "\t"); - } - - r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, &error, &default_unit_job); - if (r == -EPERM) { - log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r)); - - sd_bus_error_free(&error); - - r = manager_add_job(m, JOB_START, target, JOB_REPLACE, &error, &default_unit_job); - if (r < 0) { - log_emergency("Failed to start default target: %s", bus_error_message(&error, r)); - error_message = "Failed to start default target"; - goto finish; - } - } else if (r < 0) { - log_emergency("Failed to isolate default target: %s", bus_error_message(&error, r)); - error_message = "Failed to isolate default target"; - goto finish; - } - - m->default_unit_job_id = default_unit_job->id; - - after_startup = now(CLOCK_MONOTONIC); - log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG, - "Loaded units and determined initial transaction in %s.", - format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC)); - - if (arg_action == ACTION_TEST) { - printf("-> By jobs:\n"); - manager_dump_jobs(m, stdout, "\t"); - retval = EXIT_SUCCESS; - goto finish; - } - } - - for (;;) { - r = manager_loop(m); - if (r < 0) { - log_emergency_errno(r, "Failed to run main loop: %m"); - error_message = "Failed to run main loop"; - goto finish; - } - - switch (m->exit_code) { - - case MANAGER_RELOAD: - log_info("Reloading."); - - r = parse_config_file(); - if (r < 0) - log_error("Failed to parse config file."); - - manager_set_defaults(m); - - r = manager_reload(m); - if (r < 0) - log_error_errno(r, "Failed to reload: %m"); - break; - - case MANAGER_REEXECUTE: - - if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0) { - error_message = "Failed to prepare for reexecution"; - goto finish; - } - - reexecute = true; - log_notice("Reexecuting."); - goto finish; - - case MANAGER_SWITCH_ROOT: - /* Steal the switch root parameters */ - switch_root_dir = m->switch_root; - switch_root_init = m->switch_root_init; - m->switch_root = m->switch_root_init = NULL; - - if (!switch_root_init) - if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0) { - error_message = "Failed to prepare for reexecution"; - goto finish; - } - - reexecute = true; - log_notice("Switching root."); - goto finish; - - case MANAGER_EXIT: - retval = m->return_value; - - if (MANAGER_IS_USER(m)) { - log_debug("Exit."); - goto finish; - } - - /* fallthrough */ - case MANAGER_REBOOT: - case MANAGER_POWEROFF: - case MANAGER_HALT: - case MANAGER_KEXEC: { - static const char * const table[_MANAGER_EXIT_CODE_MAX] = { - [MANAGER_EXIT] = "exit", - [MANAGER_REBOOT] = "reboot", - [MANAGER_POWEROFF] = "poweroff", - [MANAGER_HALT] = "halt", - [MANAGER_KEXEC] = "kexec" - }; - - assert_se(shutdown_verb = table[m->exit_code]); - arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT; - - log_notice("Shutting down."); - goto finish; - } - - default: - assert_not_reached("Unknown exit code."); - } - } - -finish: - pager_close(); - - if (m) - arg_shutdown_watchdog = m->shutdown_watchdog; - - m = manager_free(m); - - for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) - arg_default_rlimit[j] = mfree(arg_default_rlimit[j]); - - arg_default_unit = mfree(arg_default_unit); - arg_join_controllers = strv_free_free(arg_join_controllers); - arg_default_environment = strv_free(arg_default_environment); - arg_syscall_archs = set_free(arg_syscall_archs); - - mac_selinux_finish(); - - if (reexecute) { - const char **args; - unsigned i, args_size; - - /* Close and disarm the watchdog, so that the new - * instance can reinitialize it, but doesn't get - * rebooted while we do that */ - watchdog_close(true); - - /* Reset the RLIMIT_NOFILE to the kernel default, so - * that the new systemd can pass the kernel default to - * its child processes */ - if (saved_rlimit_nofile.rlim_cur > 0) - (void) setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile); - - if (switch_root_dir) { - /* Kill all remaining processes from the - * initrd, but don't wait for them, so that we - * can handle the SIGCHLD for them after - * deserializing. */ - broadcast_signal(SIGTERM, false, true); - - /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */ - r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE); - if (r < 0) - log_error_errno(r, "Failed to switch root, trying to continue: %m"); - } - - args_size = MAX(6, argc+1); - args = newa(const char*, args_size); - - if (!switch_root_init) { - char sfd[DECIMAL_STR_MAX(int) + 1]; - - /* First try to spawn ourselves with the right - * path, and with full serialization. We do - * this only if the user didn't specify an - * explicit init to spawn. */ - - assert(arg_serialization); - assert(fds); - - xsprintf(sfd, "%i", fileno(arg_serialization)); - - i = 0; - args[i++] = SYSTEMD_BINARY_PATH; - if (switch_root_dir) - args[i++] = "--switched-root"; - args[i++] = arg_system ? "--system" : "--user"; - args[i++] = "--deserialize"; - args[i++] = sfd; - args[i++] = NULL; - - assert(i <= args_size); - - /* - * We want valgrind to print its memory usage summary before reexecution. - * Valgrind won't do this is on its own on exec(), but it will do it on exit(). - * Hence, to ensure we get a summary here, fork() off a child, let it exit() cleanly, - * so that it prints the summary, and wait() for it in the parent, before proceeding into the exec(). - */ - valgrind_summary_hack(); - - (void) execv(args[0], (char* const*) args); - } - - /* Try the fallback, if there is any, without any - * serialization. We pass the original argv[] and - * envp[]. (Well, modulo the ordering changes due to - * getopt() in argv[], and some cleanups in envp[], - * but let's hope that doesn't matter.) */ - - arg_serialization = safe_fclose(arg_serialization); - fds = fdset_free(fds); - - /* Reopen the console */ - (void) make_console_stdio(); - - for (j = 1, i = 1; j < (unsigned) argc; j++) - args[i++] = argv[j]; - args[i++] = NULL; - assert(i <= args_size); - - /* Reenable any blocked signals, especially important - * if we switch from initial ramdisk to init=... */ - (void) reset_all_signal_handlers(); - (void) reset_signal_mask(); - - if (switch_root_init) { - args[0] = switch_root_init; - (void) execv(args[0], (char* const*) args); - log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m"); - } - - args[0] = "/sbin/init"; - (void) execv(args[0], (char* const*) args); - - if (errno == ENOENT) { - log_warning("No /sbin/init, trying fallback"); - - args[0] = "/bin/sh"; - args[1] = NULL; - (void) execv(args[0], (char* const*) args); - log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m"); - } else - log_warning_errno(errno, "Failed to execute /sbin/init, giving up: %m"); - } - - arg_serialization = safe_fclose(arg_serialization); - fds = fdset_free(fds); - -#ifdef HAVE_VALGRIND_VALGRIND_H - /* If we are PID 1 and running under valgrind, then let's exit - * here explicitly. valgrind will only generate nice output on - * exit(), not on exec(), hence let's do the former not the - * latter here. */ - if (getpid() == 1 && RUNNING_ON_VALGRIND) - return 0; -#endif - - if (shutdown_verb) { - char log_level[DECIMAL_STR_MAX(int) + 1]; - char exit_code[DECIMAL_STR_MAX(uint8_t) + 1]; - const char* command_line[11] = { - SYSTEMD_SHUTDOWN_BINARY_PATH, - shutdown_verb, - "--log-level", log_level, - "--log-target", - }; - unsigned pos = 5; - _cleanup_strv_free_ char **env_block = NULL; - - assert(command_line[pos] == NULL); - env_block = strv_copy(environ); - - xsprintf(log_level, "%d", log_get_max_level()); - - switch (log_get_target()) { - - case LOG_TARGET_KMSG: - case LOG_TARGET_JOURNAL_OR_KMSG: - case LOG_TARGET_SYSLOG_OR_KMSG: - command_line[pos++] = "kmsg"; - break; - - case LOG_TARGET_NULL: - command_line[pos++] = "null"; - break; - - case LOG_TARGET_CONSOLE: - default: - command_line[pos++] = "console"; - break; - }; - - if (log_get_show_color()) - command_line[pos++] = "--log-color"; - - if (log_get_show_location()) - command_line[pos++] = "--log-location"; - - if (streq(shutdown_verb, "exit")) { - command_line[pos++] = "--exit-code"; - command_line[pos++] = exit_code; - xsprintf(exit_code, "%d", retval); - } - - assert(pos < ELEMENTSOF(command_line)); - - if (arm_reboot_watchdog && arg_shutdown_watchdog > 0 && arg_shutdown_watchdog != USEC_INFINITY) { - char *e; - - /* If we reboot let's set the shutdown - * watchdog and tell the shutdown binary to - * repeatedly ping it */ - r = watchdog_set_timeout(&arg_shutdown_watchdog); - watchdog_close(r < 0); - - /* Tell the binary how often to ping, ignore failure */ - if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0) - (void) strv_push(&env_block, e); - } else - watchdog_close(true); - - /* Avoid the creation of new processes forked by the - * kernel; at this point, we will not listen to the - * signals anyway */ - if (detect_container() <= 0) - (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER); - - execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block); - log_error_errno(errno, "Failed to execute shutdown binary, %s: %m", - getpid() == 1 ? "freezing" : "quitting"); - } - - if (getpid() == 1) { - if (error_message) - manager_status_printf(NULL, STATUS_TYPE_EMERGENCY, - ANSI_HIGHLIGHT_RED "!!!!!!" ANSI_NORMAL, - "%s, freezing.", error_message); - freeze_or_reboot(); - } - - return retval; -} |